main.cpp

00001 #include "mbed.h"
00002 #include "rtos.h"
00003 #include "uLCD_4DGL.h"
00004 #include "ADXL345.h"
00005 
00006 
00007 PwmOut speaker(p21); //create a PwmOut object for the speaker
00008 uLCD_4DGL uLCD(p28, p27, p29); // create a global lcd object
00009 ADXL345 accelerometer(p5, p6, p7, p8);//create a global accelerometer object
00010 Serial pc(USBTX, USBRX);// for debugging
00011 Mutex lcd_mutex;// Create the mutex lock object 
00012 
00013 int red_car_x, red_car_y,blue_car_x,blue_car_y,frog_x,frog_y,i,j;
00014 int x=0,y=0;
00015 void thread1(void const *args)//thread 1 moves the red car
00016 {
00017     
00018     while(true) {    
00019          //check for boundary conditions
00020         if(red_car_x>127){
00021         red_car_x=-16;
00022         red_car_y=32;
00023         
00024         }
00025         lcd_mutex.lock();//acquire lock
00026         uLCD.filled_rectangle(red_car_x,red_car_y,red_car_x+15,red_car_y+15,0x000000);//erase previous position
00027         red_car_x=red_car_x+16;
00028         
00029         for(i=0;i<10;i++){
00030         uLCD.filled_rectangle(red_car_x,red_car_y,red_car_x+15,red_car_y+15,0xFF3300);//change position
00031               
00032         }      
00033              
00034         lcd_mutex.unlock();//release the lock
00035         Thread::wait(500);
00036     
00037     }
00038 }
00039 
00040 
00041 void thread2(void const *args)//thread 1 moves the blue car, code similar to thread 1
00042 {
00043     
00044     while(true) {  
00045            
00046         if(blue_car_x>127){
00047         blue_car_x=-16;
00048         blue_car_y=64;
00049         
00050         }
00051         lcd_mutex.lock();
00052         uLCD.filled_rectangle(blue_car_x,blue_car_y,blue_car_x+15,blue_car_y+15,0x000000);
00053         blue_car_x=blue_car_x+16;
00054         for(i=0;i<5;i++){
00055         uLCD.filled_rectangle(blue_car_x,blue_car_y,blue_car_x+15,blue_car_y+15,BLUE);//change position
00056               
00057         }
00058                        
00059         lcd_mutex.unlock();
00060         Thread::wait(200);
00061     
00062     }
00063 }
00064 
00065 void thread3(void const *args)//thread 3 plays the sound effects
00066 {
00067     
00068      
00069     while(true) {    
00070             
00071         speaker.period(1.0/150.0); // 500hz period
00072         speaker =0.25; //25% duty cycle - mid range volume
00073         wait(.02);
00074         speaker=0.0;//stop the speaker
00075              
00076         Thread::wait(500);
00077     
00078     }
00079 }
00080       
00081 int main()
00082 {
00083        
00084    A:uLCD.cls();// clear the LCD
00085     
00086     uLCD.text_width(2); //2X size text
00087     uLCD.text_height(2);
00088     
00089     
00090     uLCD.locate(2,2);
00091     
00092     uLCD.printf("\n Frogger-G\n");//display the Title
00093     wait(0.1);
00094     
00095     // Sound effects at the start of the game
00096    for (i=0; i<500; i=i+100) {
00097         speaker.period(1.0/float(i));
00098         speaker=0.25;
00099         wait(.1);
00100     }
00101     wait(2);
00102     uLCD.cls();
00103     uLCD.text_width(2); //2X size text
00104     uLCD.text_height(2);
00105     uLCD.locate(0,0);
00106     uLCD.color( 0xFF00FF); 
00107     uLCD.printf("\n Help the  frog \n  cross \nthe road!\n");
00108     wait (2);
00109     
00110     uLCD.cls();
00111     
00112     
00113     red_car_x=0;
00114     red_car_y=32;
00115     blue_car_x=0;
00116     blue_car_y=64;
00117     frog_x=32;
00118     frog_y=96;
00119     //initialize the frog position
00120     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x99FF00);
00121     uLCD.filled_rectangle(red_car_x,red_car_y,red_car_x+15,red_car_y+15,0xff3300);
00122     uLCD.filled_rectangle(blue_car_x,blue_car_y,blue_car_x+15,blue_car_y+15,BLUE);
00123     
00124     int readings[3] = {0, 0, 0};
00125     
00126      //Go into standby mode to configure the device.
00127     accelerometer.setPowerControl(0x00);
00128  
00129     //Full resolution, +/-16g, 4mg/LSB.
00130     accelerometer.setDataFormatControl(0x0B);
00131     
00132     //3.2kHz data rate.
00133     accelerometer.setDataRate(ADXL345_3200HZ);
00134  
00135     //Measurement mode.
00136     accelerometer.setPowerControl(0x08);
00137     //Initialize all threads
00138    Thread t1(thread1); 
00139    Thread t2(thread2); 
00140    Thread t3(thread3);
00141     
00142     while (1) {
00143     
00144         
00145        for(i=0;i<5;i++)
00146        //average accelerometer readings for accuracy 
00147        { 
00148         accelerometer.getOutput(readings);
00149         pc.printf("%i, %i, %i            ", (int16_t)readings[0], (int16_t)readings[1], (int16_t)readings[2]);
00150         x=x+int16_t(readings[0]);
00151         y=y+int16_t(readings[1]);
00152         }
00153         x=int(x/5);
00154         y=int(y/5);
00155         
00156         //debug
00157        pc.printf("%d, %d   ", int(x),int(y) );
00158              
00159         //move the frog according to accelerometer readings
00160         //thresholds obtained through trial and error
00161         //move right
00162         if(y>0){
00163     lcd_mutex.lock();
00164     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x000000);
00165     frog_x=frog_x+16;
00166    
00167     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x99FF00);
00168     lcd_mutex.unlock();
00169     }
00170     //move up
00171     if(x<70){
00172         lcd_mutex.lock();
00173     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x000000);
00174     frog_y=frog_y-16;
00175     
00176     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x99FF00);
00177     lcd_mutex.unlock();
00178     }
00179     //move left
00180     if(y<-70){
00181         lcd_mutex.lock();
00182     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x000000);
00183     frog_x=frog_x-16;
00184 
00185     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x99FF00);
00186     lcd_mutex.unlock();
00187     }
00188     //move down
00189     if(x>180){
00190         lcd_mutex.lock();
00191     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x000000);
00192     frog_y=frog_y+16;
00193    
00194     uLCD.filled_rectangle(frog_x,frog_y,frog_x+15,frog_y+15,0x99FF00);
00195     lcd_mutex.unlock();
00196     }
00197     
00198     //check collisions
00199     if ((frog_x==red_car_x & frog_y==red_car_y)|(frog_x==blue_car_x & frog_y==blue_car_y))
00200     {
00201     lcd_mutex.lock();    
00202     uLCD.cls();
00203        
00204     uLCD.text_width(2); //2X size text
00205     uLCD.text_height(2);
00206     uLCD.color(RED);
00207     uLCD.locate(2,2);
00208     uLCD.printf("\n   GAME \n   OVER!\n");// display message
00209     speaker.period(1.0/500.0); // 500hz period
00210     speaker =0.5; //50% duty cycle - max volume
00211     wait(3);
00212     speaker=0.0; // turn off audio
00213     
00214     wait(2);
00215     lcd_mutex.unlock();
00216     goto A;//restart the game
00217     }
00218     //check if frog has crossed the road
00219     if (frog_y<32)
00220     {
00221      
00222     lcd_mutex.lock();    
00223     uLCD.cls();
00224         
00225    uLCD.text_width(2); //2X size text
00226     uLCD.text_height(2);
00227     uLCD.color(0xffff00);
00228     uLCD.locate(2,2);
00229     uLCD.printf("\n   You \n   WIN!\n");//display message
00230     
00231     for (i=0; i<500; i=i+100) {
00232         speaker.period(1.0/float(i));
00233         speaker=0.25;
00234         wait(.1);
00235     }
00236     wait(5);
00237     lcd_mutex.unlock();
00238     goto A;//restart the game
00239     }
00240     
00241     
00242     Thread::wait(50);   // wait 0.5s
00243     }  
00244     
00245     
00246     
00247 }